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Finding the Fourth Proportional to 14,694.93, 20,278.91 and 7,980.50

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Solution

The fourth proportional to 14,694.93, 20,278.91 and 7,980.50 is: 11,013.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,694.93 : 20,278.91 = 7,980.50 : x
  2. Step 2: Convert to fraction form
    14,694.93/20,278.91 = 7,980.50/x
  3. Step 3: Cross multiply
    14,694.93x = 20,278.91 × 7,980.50
  4. Step 4: Simplify right side
    14,694.93x = 161,835,911.90
  5. Step 5: Solve for x
    x = 161,835,911.90/14,694.93
  6. Step 6: Final answer
    x = 11,013.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.